I completely forgot about this post after the initial reply, oops!

A brush and some soapy water did clean it up, but it took awhile to get it out of some of the nooks and crannies seems to look okay now. Wouldn't advocate getting careless with it again though. I am glad I took the time to clean it well, though not as bad as my Mauser. Don't plan to use this stuff on a regular basis as I do agree they some shoot better once they get some copper build up but I feel it certainly helped on my nastiest rifles that had probably gone decades without a serious cleaning. Made no real difference with the Carbine that I could discern though.

Isn't aluminum oxide powder what is in some specific bore pastes/compounds for extreme clean up, like in the case of rust or other damage? It's what's in lapping compound as well IIRC. I'd imagine the key there is how much you mix in... honestly my 1917 has a very rough bore but it shoots so well I plan to leave it alone though the idea of some kind of compound or paste did cross my mind at one point.